9 and -2
9
The two numbers -9 + √89 (≈ 0.434) and -9 - √89 (≈ -18.434)
-9 and -13 -9 times -13 = 117 -9 plus -13 = -22
19
-5
When multiplying two negative numbers you multiply as you would with regular positive numbers the product will ALWAYS be positive. Example: -3 x -3 = 9
79
19
49
9 and -2
9
9
-11
The two numbers -9 + √89 (≈ 0.434) and -9 - √89 (≈ -18.434)
-9
A negative and a positive number will multiply to a negative number. Other than that, -9 and -8 will satisfy your conditions.